Xfinity asking me to return equipment that I never had

I received an email from Xfinity on Oct 2 asking me to "return my old equipment".  The email also states "We're happy you're enjoying your new Xfinity Gateway".  I have been an Xfinity customer previously in California since 2014, and continuing service since moving to Maryland this July 2023, and I have never had in my posession any Xfinity equipment.  I don't even know what a Gateway is, presumably it's a modem or a router?  In any event, I've been using the same Motorola modem for several years now (see photo).  I recently upgraded my router from my old Netgear router with the 3 antenna to the new Netgear Orbi (see photo).  I called Xfinity on Oct 2, and after 45 minutes on the phone they said they took care of the problem and I won't be receiving any more emails asking for returned equipment.  But again yesterday Oct 9 I received another email asking me to return equipment that I've never had, so the problem clearly has not been fixed!  I also hope that I will not be charged any sort of equipment rental fee!  Thanks in advance.